• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

How Does Machine Espresso Work?

The machine espresso uses precision pressure, and filtering technology that is amazing to create the coffee you love. What exactly does it work?

To make an espresso hot water is forced under high pressure through finely ground coffee. The process is similar to making drip coffee, but the major difference is in the pressure.

The Head of the Group

The name implies the group head is the place you put your portafilter in when making espresso. It is responsible for dispersing water into the portafilter and controlling the pressure of the resulting extraction. There are several different types of group head, each with their distinct advantages and disadvantages. Some are focused on temperature stability, whereas others on pre-infusion capabilities, and still others are designed to control the lever. Some have a combination of features, such as the E61, which is the standard choice for many baristas due to its ability to offer multiple benefits in one package.

As you can see from the image above the head of the group is fitted with a variety of notches. You can place your portafilter into these notches and turn the head around to secure it. There is also a gasket made from rubber that resides inside the notches and helps create a seal when you insert your portafilter into the machine. The notches allow for the precise placement of the portafilter. This is essential for an even extraction.

The group head not only allows the portafilter to be inserted easily however, it also keeps the same temperature. This is done by cycling hot water around the portafilter, and through the brew-basket to ensure that the temperature is always at the right level for extraction. It is crucial to keep in mind that even a small differences can make the distinction between a great and a excellent espresso.

The Pump

The motorized pumps in rotary cafe espresso machine machines provide the nine atmospheric bar pressure required for espresso extraction. This differs from manually operated piston machines that employ a lever. This pressure builds up by removing tap water from a reservoir, and pumping it through a heat exchanger before being pushed through the ground coffee inside the group head.

Pumps are generally less expensive and last longer than piston-driven machines. However, both kinds of machines can degrade because of excessive use and insufficient cleaning. They also add mechanical complexity, which can result in costly prices for even the simplest models.

Some espresso machine uk machines employ steam pressure instead of a pump in order to brew professional espresso maker. The downside is that the same boiler that produces steam also increases the temperature of water to the point of boiling which could lead to excessive extraction. The machines must also constantly rebuild their pressure in between cups. This requires energy and time.

Many espresso machines use the rotary or vibration pump. A vibration model employs a rotating disk to generate pressure, while the circular model pushes hot liquid through the ground at high speed. Both machines produce great espresso, however rotary machines are quieter, more durable and less likely to fail.

The Boiler

The boiler is the one that heats the water to the ideal temperature for extraction. The resulting steam is then transferred to the portafilter which holds the ground espresso and is then funneled down into the cup. The steam generates enough pressure to push the coffee grounds through. This produces a layer of crema on top. This is one of the hallmarks of a good espresso.

There are three types of travel espresso maker machines, each with a different type of pump and brew temperature. There are various ways to control the brew as well as the size of the cup that can be made by the machine.

The earliest espresso machine sale machines were steam types. They had a single boiler to make both steam and espresso Machine uk brew however, the pressure they could produce was very low - just two bars of atmospheric pressure, at most. The coffee tasted bitter and burned. This is why the Milanese manufacturers Luigi Bezzerra and Desiderio Pavoni created the modern espresso machine.

The most common espresso machine is a semiautomatic one with an electric pump. These are what people imagine when they think of an espresso makers maker. Semi-automatic machines require you to grind and tamp the beans yourself while the pump controls the water flow and pressure. This is a great compromise between the human touch and the mechanized consistency.

The Filter

Typically, espresso machines use a filter to separate out the grounds of the coffee as they go through the hot water. The filter is also an essential element of the machine's temperature control, since it helps to prevent overheating.

It also improves flavor, since a filter allows for a longer bloom time. This allows the beans to release their flavors, and also allows for better extraction.

It is important to remember that even the finest filter can produce a bad cup of coffee. The quality of the beans, as well as the extraction, are still crucial.

It's in this area that the magic happens. This is what makes espresso taste so delicious. The grouphead (also known as the brewhead) is where you put the portafilter, which is the thingy that you use to put the grounds of your coffee into when making espresso.

Steam-driven espresso machines make use of hot water that is heated in an airtight container to make steam. The steam then pushes hot water through the coffee grounds under high pressure. These types of machines are typically cheaper and easier to maintain than pumps-driven models. They are however limited for creating the ideal brewing conditions as they only operate with 1-1.5 bar of pressure. The perfect shot requires 9-10 bars.

In recent years, compressed air-pump-driven espresso machines have been gaining popularity. They use an air compressor to push hot water through grounds and are significantly more portable than steam-driven electric machines.